You dated this person for how many years before marrying? You got married how many years ago? You never consummated your marriage - and if not, why not (you had two days before your scheduled departure, after all)? Your spouse's threat of suicide was triggered by what - your threat to abandon her at the altar? The drug use occurred when, and you learned about it when and how? We only know what you tell us.

My guess is that you need to be thinking about a divorce, but you haven't given us the information we would need to do more than guess.